Torch.



A. F. CARLSON.

TORCH.

APPLICATION FILED FEB. 19. |915- lg o @mmm NW. 27,1%?.

2 SHEETS-SHEET llO ill" lll1 l" TORCH.

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To @ZZ whom t may concern:

Be it known that I, ALBERT F. CARLSON, a citizen of the United States, residing at Chisago city, in the county of Chisago and State of Minnesota, have invented a new and useful Improvement in Torches, of which the following is a specification.

My invention relates to improvementsin torches for cutting metal and other materials, wherein two supplies of hydrocarbon gas and oxygen mixed and independently controlled under pressure are so associated with a burner tip as to issue in the form of a double flame when ignited, one of said flames being arranged within the other and wherein a jet of oxygen is directed 'into the pit or groove cut or formed in the material by said double flame. The outer llame uses low velocity of gas while the innerl pencil flame employs high velocity of gas, the former acting-as a pilotl for and insulating the latter from the effects of the outer atmosphere. The pencil flame performs the vfunction of cutting metal and the jet of oxygen is`s'o arranged in cope'ration with said pencil flame as to supply oxygen to the metal at the hottest point, thereby consuming the melted metal to great depths and continuing the cutting operation either in conjunction with the double flame or after the metal has first been melted and the double flame discontinued. By the use of my invention, metals and other materials of various kinds and of any thickness can be easily and quickly cut. The device will cut all kinds of metal, concrete and other materials edectively.

ln this invention, there are, among its advantages, a saving of fuel; an elimination of flash backs and blow-outs; greater speed in cutting; a freedom from unburnt gases when adjusted for either a high or low temperature, no oxidizing of the metal being heated by the torch, except of the metal removed by the cutting action ofthe jet of oxygen; greater range of quick adjustment as the 'requirements of the operator may demand, and a burner of simple and inexpensive construction, the parts of which are easily made interchangeable.

The burner set forth in the present application is particularly adapted for all classes of cutting work, the specific form for welding being described and claimed in my companion application for limprovements in burners, filed Feb. 19, 1916, and bearing Specification of Letters Patent.

Patented Nov.. 2'?, 1191*?.

Application led February 19, 1916. Serial N o. 79,297.

Serial Number 79,296. The novel method of cutting metals or other materials set forth in this application is not claimed herein, it being applicants intention to protect said method by a divisional application.

With the above and further objectsV in View, which will be apparent from the following description, my invention comprises the features of construction, and combination of parts hereinafter more particularly I described and claimed.

In the accompanying drawings forming part of this specification, Figure 1 is a side elevation of my invention, part of the structure being broken away and in section; Fig. 2 is a section taken on the line X-X of Fig. 1; Fig. 3 is a section on the line Y-Y of Fig. 1 through one of the supply valves; Fig. Ll is an enlarged longitudinal section of a detail; Fig. 5 is a plan looking up at the end of the burner tip, and Fig. 6 is a plan of an alternative form looking up at the end of the burner tip.

In the drawings, A indicates a handle having a cylindrical body or casing 2 mounted upon two end pieces 3 and 4, which coperate therewith in forming a chamber. The end 3 is provided with a pair of valve fittings 5 and 6, the fixture 5 controlling the supply of hydrocarbon gas (Blau-gas for instance) and the fixture 6 controlling the supply of oxygen under suitable pressure. Connected with the valve fitting 5 to be controlled by its valve 'is a supply pipe 7 and connected with the valve fitting 6, so as to be controlled by its valve is a supply pipe 8. In the same manner, a supply pipe 9 is connected to the valve fitting 5, so as not to be controlled by its valve and another pipe 10 is connected with the valve fitting 6, so as not to be controlled by its valve. All of said pipes 7, 8, 9 and l0 extend longitudinally through the chamber in the handle. The pipes 7 and 8 which are controlled by the valves in the fittings 5 and 6, extend forwardly andare connected with passages 11 and l2 in the forward end member 4 and the pipes 9 and l0 are connected with a valve casing 13, (see Fig. 2), having valves 14 and 15, which respectively control the ducts leading through the pipes 9 and 10. By this means one pair of the supply pipes7 and 8 is controlled by the pair of valve elements 5 and 6, while the other pair 9 and 10 is controlled by the valve elements 14 and 15u extremities being ultimately connected with my improved burner head B to be hereinafter described. Thus there is a supply of independently controlled combustible gas and oxygen` under pressure regulated by valves and delivered by eachv pair of supply piges for use in my improved burner.

he forward end member 4 is formed with a threaded nipple 16 through which the ducts 11 and 12 extend and upon said nipple is mounted by threaded connection, a forwardly projecting nozzle 17 containing a longitudinal passage 19 emptying into a mixing chamber 20 for combustible gas and oxygen delivered by the ducts 11 and 12. The mixing chamber 20 is .formed in the end of a longitudinal stem 21, which is threaded upon the nipple 16 projecting from the end member 4. The stem 21 vis also provided with a longitudinal passage 23 extending throughout itslength and connecting'with the mixing chamber 20. The nozzle 17 pro-4 jects the oxygen received from the supply pipe 8 and thoroughly mixes the same with the combustible gas received fromthe supply pipe 7 in said mixing chamber. The mixture thus formed is conducted through the passage 23 into my improved burner head B.

The burner head B is formed with a body or casing 24 divided by a partition 25 into an upperu fuel mixing chamber 26 for the welding fiame and a supply compartment 27 for receiving the mixture from the mixing chamber20. The portion of the body adjacent the compartment 26 has threaded thereinto a stopper j or cap 28, which is formed with a small oxygen supply nozzle 29 extending downwardly into the chamber 26, said stopper being provided with a` passage 30 extending through the nozzle 29. The outer portion of the stopper 28 has secured thereto by the coupling 31 the oxygen supply pipe 10, so that oxygen is projected downwardly into the mixing chamber 26 and mixed with the combustible gas therein, said gas being admitted into said mixing chamber 26 `around the Inozzle 29 from a duct 32, which is connected with the supply pipe 9 by a coupling 33. The mixture -thus formed is projected downwardly through a tapering passage 34 in the pencil flame nozzle 35, which is of conical shape tapering downwardly and has its body or upper end threadedv at 36 through an opening in the partition 25. Threaded upon the body of the burner head by the threaded connection 37 is an insulating flame nozzle 38, which is also of conical shape tapering from the body of the burner and formed with an inner,

outwardly tapering passage 39.

This passage conducts the mixture of combustible gas andv oxygen from the conducting chamber 27 throu hA the tip of the lburner, where it is ignite a series of perranged, their mixture conducting passages being adapted to produce an inner stream of high velocity combustible mixture surrounded by another stream of low velocity combustible mixture. When these streams are ignited an inner pencil flame of extremely high temperature is produced surrounded by a`jacket ame', which insulates the pencil flame from the effects of the outer atmosphere, said. inner flame being adapted to quickly melt metal or other material which is treated. Situated on the side ofthe jacket flame or insulating nozzle is a branch 45 containing a longitudinal passage 46, the orifice ofV which terminates immediately'adjacent the tip of the burner. To

4the upper end of the branch 45 is connected by a coupling 47 lan oxygen supply pipe 48, which is supported by the end member 4 and is connected by the Y coupling 49 to the main supply pipe 50 of oxygen under l pressure, which is also coupled with the valve itting 6. The oxygen supply pipe 48 has connected thereto a spring closed valve 51, which is opened by a thumb piece 52 conveniently arranged to the handle A. In operation the valves controlling the supply of oxygen and gas to the mixing chambers 20 and 26 areopened and regulated, and the mixtures resulting therefrom and passing outwardly through the passages in the nozzles 35 and 38 are ignited at the tip of the burner. The flames resulting are regulated to the desired size and temperature by said valves until the inner iiame is projected at high velocity in a long thin pencil from the tip of the burner surrounded by a jacket flame acting under low velocity and insulating the pencil flame from the e'liects of the outer atmosphere. The burner 'is used in the ycustomary manner, the pencil flame being directed upon the surface of metal or other material to be cut and the temperature regulated by said valves. After the pencil flame has melted the material so that a pit is formed, a jet of oxygen is pro jected y 'opening Ithe valve 51, causing a stream of oxygen to be directed down` into the pit whereupon the metal is fused and cleanly cut to great depth quickly, the oxygen combining with the melted metal and consuming the latter a'nd causing a clean cut to be made. It is not necessary to main- Learner.

tain the double flame produced by the nozzles 35 and 38. after the cut has been started, the jet of oxygen performing the function of consuming the metal automatically, how` ever, the best results are obtained by using the pencil and insulating flames and the et I of oxygen;simultaneously 5 While the drawing illustrates a series'of l. is

perforaltrons .40 surrounding the centrally disposed orifice from the inner nozzle, it will be understood that the openings 40 can be in the form of a single circular opening between the nozzle 38 and the nozzle 35 as illustrated in Fig. 6 ofthe drawing, and asset forth in my companion application above referred to.

In accordance with'the patent statutes, ll have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but l desire to have it understood .that the construction shown is only illustrative and that the invention can be carried out by other means and applied vto uses other than those above set forth within the scope of the following claims. Y

Having described my invention, what ll claim as new and desire to protect by Letters Patent is: I A

1. A device for metallurgical purposes, comprising, in combination, a burner having 'a plurality of mixing chambers, ducts .ad-

mitting a supply of oxygen and a supply of hydrocarbon gas into each of said chambers, mixture conducting passages leading from each of said chambers and terminating in orifices arranged closely adjacent at the outer extremity of the burner and one axially of the other, the inner orice being adapted. to project a pencil liame and the outer orifice forming a jacket of flame surrounding` and 1finsulatlng said pencil flame from the effects of the outer atmosphere and reducing the tendency of the metal being heated from oxidizing, means for regulating each of said ducts, whereby the proportions of the constituents entering sald mixing chambers and the velocities of said mixtures can be adjusted, means carried by said burner `for directing a jet of oxygen into the pit formed by said Ipencil flame in the material being cut and means for controlling the amount of oxygen in said j et.-

as '2. A device for lmetallurgical purposes,

comprisin akburner having a'pair ofinxture cham ers, means for supplying oxygen and hydrocarbon gas to each of said chambers, means 'for .independently regulating each of said supplies, a burner tip having two nozzles arranged one withinthe other, the outer nozzle having an orifice connected with one of said mixture chambers forming a jacket flame of an ignited mixture of gas and oxygen of. comparatively low velocity and said inner orice connected with the other of said mixture chambers and forming a pencil flame of an ignited mixture of hi h velocity gas and oxygen insulated from t e eects of the outer atmosphereby said jacket flame, said orices being arran ed closely adjacent at the extreme outer en of the burner, means carried by said burner for directing a jet of oxygen into the pit formed by said pencil flame inthe material beingy cut and means for controlling the amount of oxygen in said jet.

3. A device for metallurgical purposes, comprising, in combinatioma burner head having two compartments one of which forms a mixing chamber and the other a conducting passage, a valved hydrocarbon gas supply duct entering said chamber, a

valve controlled oxygen supply nozzle in said chamber, a welding flame nozzle co-axially disposed to said oxygen supply nozzle and secured in a wall of said compartments and traversing said conducting passage for emitting the mixture from said mixing chamber, a second mixing chamber having a duct leading into said conductin passage and4 valved gas supply and valve oxygen supply passages entering said second mixing chamber, an insulatingI ame nozzleco-axially arranged tol said welding'flame nozzle:

and connected with said conducting passage, said insulating and welding dame nozzles having an outer annular orice and an 1nner oriiice concentrically arranged to Said outer orice, said orifice being arranged closely adjacent at the outer extremity of said burner, said insulating Hame nozzle having a valved oxygen supply. duct terminatmg in an orifice arranged to direct a jet of oxygen into the pit formed in the material due to the cutting action of said pencil flame.

In testimony whereof, ll have signed my name to this specification.

ALBERT Il". CARLSGN.

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